When I did the driving course, they took us out three at a time following a "pro" in the lead car. We took it in segments to learn the track. The first time out, the lead car said we would "take it easy" the first time. (We had radio comm.) Holy cow, I could barely keep up.
Later, as the wife was with me and not driving, they let her sit with the pro driver and she said the driver was driving with one hand on the wheel and talking in the radio at the same time as if it was nothing. I was doing all I could to keep up. It ended to brake WAY too soon for fear of bending some expensive sheet metal and was hesitant to attack the turns, especially the one that is elevated and sharp.
It was a fascinating day and they did it quite well. The wife said riding along was scary but fun.
We hit about 135 mph on the back straight a few times before braking. The cars were automatics and they told us to use the brakes not the flappy paddles. And we had the suspension settings in "Track One" as I recall, so the car was correcting some of our mistakes.
135 mph is really fast, for me.